用户在文本框中输入需要转换的十进制数，通过点击3个按钮在标签中显示结果。（点击一个实现一个）

import java.awt.Button;

import java.awt.FlowLayout;

import java.awt.Frame;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.*;

 

import javax.swing.*;

public class  jinzhi extends FrameimplementsActionListener{

    JTextField input;

    Button bn1;

    Button bn2;

    Button bn3;

    JTextField result1;

    JTextField result2;

    JTextField result3;

    jinzhi(){

    this.setSize(800, 250);

    input = new JTextField(5);

    bn1 = new Button("二进制");

    bn2 = new Button("八进制");

    bn3 = new Button("十六进制");

    result1 = new JTextField(5);

    result2 = new JTextField(5);

    result3 = new JTextField(5);

    this.setLayout(new FlowLayout());

    add(input);

    add(bn1);

    add(result1);

    add(bn2);

    add(result2);

    add(bn3);

    add(result3);

    bn1.addActionListener(this);

    bn2.addActionListener(this);

    bn3.addActionListener(this);

    this.setVisible(true);

    this.addWindowListener(new WindowAdapter(){

        public void windowClosing(WindowEvent we){

         System.exit(0);

        }

       });

    }

    @Override

    public void actionPerformed(ActionEvent e) {

       if(e.getSource()==bn1)

       result1.setText(Integer.toBinaryString(Integer.parseInt(input.getText())));

       else if(e.getSource()==bn2)

       result2.setText(Integer.toOctalString(Integer.parseInt(input.getText())));

       else if(e.getSource()==bn3)

       result3.setText(Integer.toHexString(Integer.parseInt(input.getText())));

       }

      

   

    public static void main(String[] args) {

       new jinzhi();

    }

}